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Linux Virtual Machine PHP Invoked OOM-killer (Out of Memory) Issue

johnyan 0

One of my GCP VM is running at f1-Micro type which only has limited memory, 614MB. From syslog, I found it has a PHP invoked OOM killer messages. This usually means this server essentially ran out of memory and extra memory should add into this system, Based on some posts online, especially this 2010’s  post : “The Linux kernel likes to always allocate…

Ubuntu Basic System and Service Configuration Commands

johnyan 0

1. Update / Upgrade Commands sudo apt-get update : In a nutshell, apt-get update doesn’t actually install new versions of software. Instead, it updates the package lists for upgrades for packages that need upgrading, as well as new packages that have just come to the repositories. sudo apt-get upgrade : will fetch new versions of packages existing on the machine if APT…

Install Portainer to Manage Containers – Nginx, MySQL, WordPress

johnyan 0

Portainer is a lightweight management UI which allows you to easily manage your different Docker environments (Docker hosts or Swarm clusters). It is meant to be as simple to deploy as it is to use. It consists of a single container that can run on any Docker engine (can be deployed as Linux container or a Windows native container). Portainer…

IBM Guardium: Basic Configuration(License, NTP, SMTP, Data Related, Backup, Schedule, LDAP, Syslog)

johnyan 0

This post is a summary for those basic IBM Guardium configuration. The IBM Guardium products provide a simple, robust solution for preventing data leaks from databases and files, helping to ensure the integrity of information in the data center and automating compliance controls. These are the key functional areas of Guardium’s database security solution: Vulnerability assessment. This includes not just…

IBM Guardium: Create an Alert / Policy / Classification

john 0

An alert is a message indicating that an exception or policy rule violation was detected. Alerts are triggered in two ways: A correlation alert is triggered by a query that looks back over a specified time period to determine if alert threshold has been met. The Guardium Anomaly Detection Engine runs correlation queries on a scheduled basis. By default, correlation alerts do…

Install Nginx, MariaDB, PHP (LEMP) and WordPress on GCP Free Tier Ubuntu/CentOS VM

john 0

I was using LAMP for my WordPress blog for quite a few years. Because of Google Cloud Platform free VM’s limitation, I am always suffering the performance issue if put all of them into one machine. Since last year, I was keeping trying using a different type of technologies to help. I tried to use Docker, also I separated Mysql…